Pipe clamp



5. few't'' /X a? Jan. 1, 1924 R. S. PEIRCE PIPE CLAMP Filed Nov. 27. 1922 three Patented Jan. 1, 1924.

--UNITED STATES RALPH S. PEIRCE, 0F HINSDALE, ILLINOIS.

PIPE CLAMP.

Application fi1ed November 27, 1922. Serial No. 603,432.

To all whom it may concern.

Be it known that I, RALPH S. PEIROE, citizen of the United States, residing .at Hinsdale, in the county of Du, Page and State of Illinois, have invented a certain new and useful Improvement in Pipe Clamps, of which the, following is a full, clear, concise, and exact description.

My invention relates to clamps which may be disposed about cylindrical objects such as water hose and other piping.

In the clamp of my invention there is em ployed a band of ribbon form which is circular in curvature and whose ends preferably overlap, though the'invention is not to be thus limited. This band hastwo out- Wardly extending lateral projections. One of these projections is preferably formed by folding an intermediate part of the. band to leave a continuation which is suflicient in extent to underly' the other lateral projection whereby a completely encircling band is produced, though the invention is not to be thus restricted. One of these lateral projections is preferably a conduplicate fold whose bight end is folded back toward the band, the projection at the intermediate portion ofthe band being preferably thus formed. 2

Both lateral projections of the band are formed with bolt passages and oneof these lateral projections is constituted to serve as a nut wlth which the bolt has threaded engagement. 7

In the preferred embodiment of the invention the inter-crown space of the bolt threads is widerthan the thickness of the edge ortion of the band that enters the l space and this edge portion is preferably of helical curvature conforming to the spiral of the thread. The lateral projection of the band thus formed for engagement with the thread of thebolt is preferfiblyi the one which is at the free end of the The invention will be more fully explained by reference to the accompanying drawing in which Fig. 1 is a view in side.

elevation of a clamp constructed in accordance with the preferred embodiment ofthe inventio Fig. 2 is a perspective view of the clamp Fig. 3 is a cross sectional view of my clamp somewhat modified; Fig. 4 illustrates,

elevation, the clamp of Fig. 3 with 'the bolt omitted; and Fig. 5 shows the spiral shapown in Fig. 1 with the bolt omitted;

ingcpf a bolt thread engaging portion of the Like parts are indicated by similar characters of reference th'roughoutthe difl'erent figures.

The band 1 is oblong in cross section, being of ribbon formation. It is formed with two outwardly extended lateral projcctions generally indicated at 2 and 3.

In the form of the invention shown in Figs. 1 and 2 the projection at 3 isafour sided fold 4 of conduplicate formation, this projection 3 being the one which is preferably formed at an intermediate part of the band to leave a band continuation 5 which underlies the projection 2. The bight end 6 of the conduplicate fold is folded back toward the band to enhance the rigidity of the projection 3 with relation to the band that supports it. I

In the form of the invention illustrated in Figs. 3 and 4 the four sidedfold -is of sinuous formation, the bi ht 7 of the two inner layers or sides of t e fold being interposed between the two outer layers or sides of the fold, this bight increasing the rigidity between the circular portion of the band and its projection 3. The projection at 2 is of sinuous formation in both forms of the invention, .there being four layers or sides to the fold. The bight 8 of'the two inner layers of the projection 24s interposed between the two outer layers of this projection and also increases the rigidity between the intermediate projection at 3 an the.

threaded portion of the bolt is in threaded engagement with the projection at 2.

As illustrated, each layer of the fold of the projection 2 is in engagement with the bolt substantially 1 throughout the circumference of the latter, the portion of each fold layer that engages the thread of the bolt being of helical curvature at its thread'engaging edge to conform to-the spiral of the thread. Where the engaging part of each fold side of projection 2 substantially circumscribes the bolt and the thread engaging edge portion of such fold is helically shaped as described, at least one slot or slit 14 is formed in each fold layer to permit the thread engaging edge portion to follow the helical direction of the bolt thread.

- having thus described my invention I claim as new and desire to secure by Letters Patent the following 1. In a clamp, the combination with a band that is oblong in cross section and has two outwardly extending lateral projections formed with bolt receiving passages therethrough; of a ho t passing through said passageshaving t reads receiving an edge portion of the band and whose intercrown,

space is wider than the thickness of the band, the portion of the band that engages the thread of the bolt being of helical curiral of such thread.- 2. In a clamp, the combination with a band that is oblong in cross section and has "vature at its tread engaging edge which conforms to the two outwardly extending lateral projections formed with bolt receiving passages therethrough; of a bolt passing through said passages having threads receiving an edge portion of the bandgthe portion of the band that engages the thread of the bolt being of helical curvature at its thread engaging v edge which conforms to the spiralof such thread.

3. In a clamp, the combination with a band that is oblong in cross section and has two outwardly extending lateral-projections formed with bolt receiving passages therethrough; of a bolt passing through said passages having threads receiving an edge poi tion of the band, the projection of the band that engages the thread of the bolt being sinuously folded with the outer layer of the fold in engagement with the bolt 'and of helical curvature at its thread engaging edge which conforms to the spiral of such thread.

In witness whereof, I hereunto subscribe my name this 23d day of November A. D.,

RALPH s. PEIRCE. 

